Clip system versus direct connection | Ask The Experts Forum

Guest User 12/5/2007	I'm wondering what the pros and cons are for using a standing seam mtl roof applied directly to the substrate versus a clip system. Specifically if there are any oil canning or telegraphing concerns with one or the other. Any help would be greatly appreciated.	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/10625/find/
Ken Buchinger NCI Building Systems, Inc. 12/5/2007	I assume you are asking about the difference between a concealed fastener system, such as a nail flange panel, and a true standing seam, which utilizes hold down clips. Most true standing seam systems use clips that allow for thermal expansion, which does minimize the oil canning associated with thermal movement. They typically hold the panel off the roof deck a small amount which will help hide uneven decking or felt fasteners.	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/10626/find/
Guest User 12/5/2007	That is what I had assumed. But is there any direct benefit to using a system applied directly to the substrate versus the clip system?	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/10627/find/
Todd Miller Isaiah Industries, Inc. 12/9/2007	Clip systems are generally seen as higher end systems as they have greater allowance for expansion and contraction of the metal.	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/10628/find/
Brian Selig Architectural Building Components Metal Roof and Wall Panels 12/10/2007	For the contractor, he doesn't have to carry clips with him on the roof. A panel that is elevated in some small way can prevent a lot of radiant heat transfer. The clips must have offsets. So, in addition to the relief from oil-canning, you should be able to reduce your energy bill a little more with a clip system. It sure is important here in Houston. Have you seen any wind uplift values on this nail-strip panel?	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/10629/find/
Todd Miller Isaiah Industries, Inc. 12/29/2007	Thanks Brian.	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/10630/find/
Guest User 3/20/2008	We run a true snap lock 12" panel in our plants in oregon. It is a clipless system that works very well. We run a kynar paint system with a duracoat pigment which enables this panel to be energy star rated. As far as the expansion contraction issue it's really only a horizontal problem than a vertical problem. I've never heard a complaint on our system as to this problem.	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/10631/find/
Todd Miller Isaiah Industries, Inc. 3/21/2008	Thanks.	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/10632/find/

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